<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 图片盒子 -->
      <div class="avatar_box">
        <img src="../assets/logo.png">
      </div>
      <!-- 表单 -->
      <el-form
        class="login_form"
        ref="loginForm"
        :model="loginForm"
        :rules="loginFormRules"
      >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            prefix-icon="iconfont icon-user"
          > </el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            prefix-icon="iconfont icon-3702mima"
            type="password"
          > </el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="btn">
          <el-button
            type="primary"
            @click="login"
          >登录</el-button>
          <el-button
            type="info"
            @click="reset"
          >重置</el-button>
        </el-form-item>
      </el-form>
    </div>

  </div>
</template>

<script>
export default {
  data () {
    return {
      // 登录表单
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 登录表单规则
      loginFormRules: {
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入登陆密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  created () {

  },
  methods: {
    // 重置按钮监听
    reset () {
      this.$refs.loginForm.resetFields()
    },
    // 登录按钮监听
    login () {
      // 表单预校验成功后的回调
      this.$refs.loginForm.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error('登录失败!')
        this.$message.success('登录成功!')
        // 加window性能更好一点 不要在作用域链中找
        window.sessionStorage.setItem('token', res.data.token)
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style scoped lang='less'>
.login_container {
  height: 100%;
  background-color: #2b4b6b;
}
.login_box {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 450px;
  height: 300px;
  transform: translate(-50%, -50%);
  background-color: #fff;
  // box-shadow: 0 0 10px #ddd;
  .avatar_box {
    position: absolute;
    padding: 10px;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 130px;
    height: 130px;
    background-color: #fff;
    border-radius: 50%;
    box-shadow: 0 0 10px #ddd;
    img {
      display: block;
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #efefef;
    }
  }
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  box-sizing: border-box;
  padding: 0 20px;
}
.btn {
  display: flex;
  justify-content: flex-end;
}
</style>
